30449772 has 36 divisors (see below), whose sum is σ = 78427440. Its totient is φ = 9957792.

The previous prime is 30449759. The next prime is 30449773. The reversal of 30449772 is 27794403.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×30449772² = 1854377229703968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (30449773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6072 + ... + 9887.

It is an arithmetic number, because the mean of its divisors is an integer number (2178540).

Almost surely, 2^30449772 is an apocalyptic number.

It is an amenable number.

30449772 is an abundant number, since it is smaller than the sum of its proper divisors (47977668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30449772 is a wasteful number, since it uses less digits than its factorization.

30449772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16022 (or 16017 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 30449772 is about 5518.1312053992. The cubic root of 30449772 is about 312.2683834678.

The spelling of 30449772 in words is "thirty million, four hundred forty-nine thousand, seven hundred seventy-two".